Knock-back abilities are strong against her, as they will prevent her from initiating fights.Report

220

If she misses her Arctic Assault or her ultimate, your team a will have an advantage window. It's also fairly easy to Flash out of these abilities!
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20

Sejuani is an extremely weak early game jungler, try to counter jungle as much as possible and try to kill her before she scales into late game. Strong duelists like Lee Sin, Elise and Vi can make this a very easy task.Report

Damaging an enemy with an ability or basic attack grants 10 / 15 / 20 / 25 bonus armor and reduces movement-slowing effects on Sejuani by 10 / 15 / 20 / 25% for 2 seconds. Subsequent damage will increase the duration by 2 seconds up to a cap of ~8 seconds, where after damage will refresh the duration.

Active: Sejuani throws her frost-forged bola in a line. If the bola hits an enemy champion, it shatters, stunning the target and nearby enemies for a duration. If the bola reaches its maximum range, it shatters and slows enemies by 90% instead.